Cementing tool



Dec. 29, 1942. LE ROY BROWN 2,306,353

CEMENTING TOOL Filed June 25, 1940 4 INVEN TOR BYLE oy BROWN.

Patented Dec. 29, 1942 UNITE STATES FATENT OFFICE CEMENTING TOOL LeRoy-Brown, Huntington Park, Calif. Application June 25, 1940, Serial No.342,302

6 Claims.

, This invention relates to a cementing tool whereby different areaswithin a bores hole, the casing or the liner may be cemented.

An object of my invention is to provide a novel cementing tool,including spaced packers, there being an opening between the packersthrough which cement may be forced, and including means to permit thecirculation of fluid through the tool while the tool is being run intothe well.

Another object of my invention is to provide a novel cementing tool ofthe character stated, provided with a valve which controls thelongitudinal passage through the tool, said valve being manuallycontrollable after the tool is in position in the well.

Another object is to provide a novel cementing tool of the characterstated, which is effective in operation, and the passage therethroughbeing opened or closed at will by the operator to enable cement to beforced through an opening between spaced packers.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description, and theappended claims.

In the drawing:

Figure l is a side elevation of my cementing tool.

Figure 2 is a longitudinal, quarter, sectional view of the same,

Figure 3 is an enlarged fragmentary, longitudinal, sectional view of thevalve and tube in which it is seated.

Referring more particularly to the drawing,

my cementing tool I is essentially tubular and open from top to adjacentthe bottom thereof although the tubular body of this tool is made up ofa number of parts which are threaded together to form the whole as willbe more specifically described.

At the upper end of the tool, a pipe 2 is provided, to the upper end ofwhich a slip head 3 is secured. The slip head is preferably screwed ontothe pipe 2, and the drill pipe (not shown) screws into the head 3. Aplurality of slips 4 are mounted in the head 3, and these slips aremoved into engagement with the casing or liner of the well by aplurality of spring arms 5, which surround the pipe 2 and are connectedto the slips by links 6. The slips 4 are normally held in retractedposition when the tool is being run into the well, and when the area tobe cemented is reached, the arms 5 are released by disengagement from apin 1 (all of which is usual and 55 motion connection betweenwell-known) thereby permitting the slips 4 to be moved outwardly intoengagement with the casing on downward movement of the tool relative tothe arms 5 and the slips 4. Spaced packers 8 and 9 are arranged on thetool belowthe slip assembly, and thesepackers surround the tubular bodyof the tool and closely engage the wall of the casing. The packers 8 and9 are preferably mounted on sleeves Ill and II respectively, which arescrewed together, the sleeve ID in turn screwing into the upper part ofthe tool and the sleeve H screwing into or onto the lower part of thetool. A hole [2 between the packers 8 and 9' permits cement to passoutwardly from the tool between the packers after the desired pointinthe well has been reached.

A bottom shoe l3 forms the bottom of the body of the tool, and a fluidport M in the shoe enables fluid to pass out of the body of the toolbelow the packers 8 and 9 while the tool is being run in the well. Afterthe tool has reached the position in the well which the operator desiresto cement, the longitudinal passage l5 through the tool is closed by thefollowing arrangement:

A valve stem l6 extends into the bottom of the tool, and its lower endis provided with spring fingers H, which are fixedly attached to thestem. These fingers drag against the inside of the casing while the toolis being run into the well. Packing I8 is provided in the shoe I3 andbears against the valve stem l6, substantially as shown in Figure 2.This packing is held in position and is pressed against the valve stemby the gland [9. This gland is provided with coarse inside threads, andthe valve stem IE is provided with threads 20 from the outside thereofwhich screw into the gland, thus enabling the valve stem to be movedlongitudinally relative to the tool on rotation of the tool, the valvestem being held stationary by the spring fingers H. A valve 2| isprovided on top of the stem I6, and this valve seats on top of thesleeve ll below the port 12, as shown in Figure 2. In order that thevalve 2| may not be accidentally seated or unseated, I provide a lostthe valve and the stem ES. This lost motion connection may include anenlarged window 22 in the valve stem, the valve 2| being provided with apin 23 which extends into this window. The pin 23 projects from a pintle24, which fits into the top of the valve stem, as shown in Figure 3, Acoil spring 25 surrounds the stem of the valve 2|, and normally urgesthe valve onto its seat. When the tool is being run into the hole, thevalve 2| is lifted off of its seat, and. thus fluid can pass downwardlythrough the tool and out through the fluid port I4.

When it is desired to cement a section of the casing, the tool isrotated and since the spring fingers I! are bearing against the casing,the valve stem IE will be held stationary. The threads 20 will bescrewed downwardly in the gland l9 by this rotation of the tool untilthe valve 2| rests on its seat on top of the sleeve ll. Cement is nowforced downwardly through the drill pipe and into the tool, and thiscement passes outwardly through the port or ports I 2 between thepackers 8 and 9 to complete the cementing job.

Having described my invention, I claim:

1. A cementing tool comprising an'elongated hollow body, a pair ofspaced packers mounted on the body, said body having an outlet portbetween the packers, a valve seated in the body below said port; saidbody having a fluid outlet port below the valve and below the lowermostpacker, and means operable on movement of the tool to open or close saidvalve, said means including a valve stem depending from the valve andprojecting from the bottom of the tool, wall engaging means on the lowerend of the valve stem said valve and valve stem being longitudinallymovable in the body, whereby the valve may be opened or closed onmovement of the body of the tool relative to the valve.

2. A cementing tool comprising an elongated hollow body, a pair ofspaced packers mounted on the body, said body having an outlet portbetween the packers, a valve seated in the body below said port, saidbody having a fluid outlet port below the valve and below the lowermostpacker, and means operable on movement of the tool to open or close saidvalve, said means including a valve stem depending from the valve andprojecting from the bottom of the tool, wall engaging means on the lowerend of the valve stem, threads on the valve stem, said threads screwinginto threads in the body of the tool whereby rotation of the tool bodyrelative to the valve stem will move the valve into open or closedposition.

3. A cementing tool comprising an elongated hollow body, a pair ofspaced packers mounted on the body, said body having an outlet portbetween the packers, a valve seated in the body below said port, saidbody having a fluid outlet port below the valve and below the lowermostpacker, means operable on movement of the tool to open or close saidvalve, said means including a valve stem depending from the valve andprojecting from the bottom of the tool, wall engaging means on the lowerend of the valve stem said valve and valve stem being longitudinallymovable in the body whereby the valve may be opened or closed onmovement of the body of the tool relative to the valve, and meansyieldably mounting the valve on said valve stem.

4, A cementing tool comprising an elongated hollow body, a slip assemblymounted on the upper end of the body, a pair of spaced packers mountedon the body below the slip assembly, said body having an outlet portbetween the packers and a'fluid port below the lower packer, a valveseated in the body below the first-named port, a valve stem dependingfrom the valve and projecting from the bottom of the body, and wallengaging means on the lower end of the valve stem whereby relativemovement of the valve stem and tool body will open or close the valve.

5. A cementing tool comprising an elongated hollow body, a slip assemblymounted on the upper end of the body, a pair of spaced packers mountedon the body below the slip assembly, said body having an outlet portbetween the packers and a fluid port below the lower packer, a valveseated in the body below the first-named port, a valve stem dependingfrom the valve and projecting from the bottom of the body, and wallengaging means on the lower end of the valve stem whereby relativemovement of the valve stem and tool body will open or close the valve,and means yieldably mounting the valve on the valve stem. I

6. A cementing tool comprising an elongated hollow body, a slip assemblymounted on the upper end of the body, a pair of spaced packers mountedon the body below the slip assembly, said body having an outlet portbetween the packers and a fluid port below the lower packer, a valveseated in the body below the first-named port, a valve stem dependingfrom the valve and projecting from the bottom of the body, wall engagingmeans on the lower end of the valve stem, external threads on the valvestem, said threads screwing into internal threads in the body wherebyrotation of the tool body relative to the valve stem will open or closethe valve.

LE ROY BROWN.

